Warp stop motion



H. E. KHOURY WARP STOP MOTION July 24, 1928.

Filed July 6, 1926 5 Sheets-Sheet hary E. K/m'u y 61cm new July 24, 1928. 1,678,253,

H. E. KHOURY WARP STOP MOTION Filed July 6, 1926 5 Sheets-Sheet 2 Hary l1 boa/ y July 24, 1928. 1,678,253

H. E. KHOURY WARP STOP MOTION- Filed July 6, 1926 5 Sheets-Sheet 3 @ggi 13259.9.

fiary Kbau y July 24, 1928.

H, E. KHOURY WARP STOP MOTION Filed July 1926 July 24,1928. 1,678,253

H. E. KHOURY WARP STOP MOTION Filed July 6, 1926 5 Sheets-Sheet 5 w i i a i l A g liar/31 111C710 zuy Patented July 24, 1928.

urreo STATES HARRY E. KHOURY, OF NEW BEDFORD, MASSACHUSETTS.

WARP STOP MOTION.

Application filed July 6, 1926. SerialNo. 120,738.

The present invention relates to warp stop motions for looms, and more particularly to that type of stop motion wherein the harness or shed forming heddles perform the additional. function of detector'wire-"s, which serve to stop the loom wheneverone of the warp threads breaks ordrops. 1

Stop motions of this type are broadly old, and are illustrated, for example, in my Patents Nos. 1,527,195 and 1,527,196, granted February 24th, 1925.,

An object of the present invention is to provide a stop motion of this type which is simple in construction, positive and accurate in operation, and which may be readily applied to the loom. V I i I 1 A further object of the invention is to provide a mechanism which may be conveniently applied to any loom, irrespective of the number of harnesses These and other objectsof thevinvention, which will become apparent as the description proceeds, are accomplished by a mech anism which comprises, broadly, the usual heddle frames, each havingtherein a detector bar having a rocking movement, the heddles being formed to lock the bar against such movement whenever one of the warp threads breaks or slackens. heddles and upon the loom frame is positioned a bracket having therein a lever provid'ed with a plurality of members, each engageable by a detector bar and serving to rock such detector bar as its heddle frame moves. Thelever is yieldinglyheld against movement, but when engaged by a locked bar, is, actuated, and through suitable connections serves-to stop the loom. These connections comprise a member normally positioned out of the path of a continuously moving element or dagger upon the loom lay, and which is actuated by a locked bar into the path of the dagger. Upon engagement of the dagger with such member, the latter, through connections with the shipper lever, serves to stop the loom. a The foregoing and other features of. the invention will become clearer as the description proceeds in connection with the accompanying drawii'lgs, wherein are shown pree fered embodiments of the invention.

In these drawings 2, r i t Figure 1 isa side elevational view of the mechanism, with portions of the loom frame indi :ated in dotted. lines to illustrate the Adjacent the relation between the an 1sm and the loom.

Figure 2 1s a fragmentary elevational View parts of the stop mechshowing the relation between a heddle frame and the contact parts WlllCll are mounted upon the loom.

means for the detector bar and heddle frame cross rod. y

Figure 5 1s a section on the line 5-5 of Figure 2, showing the means for limitingthe rocking movement of the detector bar.

Figure Gris a fragmentary sectional view at the end of the detector bar, as illustrated in Figure 2. I i Y o Figure 7 isan enlarged detail view of the supporting bracket and lever illustrated in Figure 1. v v r Figure 8 is a view showing the normal position of the detector, bar in one of the heddles.

Figure 9 is a view showing the relative position of the hedolle and detector bar when one of the Warp threads breaks and the heddle drops.

Figure 10 is a side elevational view of a modified form. f

Figure 11 is a rear elevational view of the form illustrated in Figure 10, looking from the rear of the bracket.

Figure 12 is a view showing the relation of the heddle and detector bar beitorebreakage of one of the warp threads.

Figure 13 is a view showing relation of the parts iuFigure 12 when one of the warp threads breaks, and

Figure let is a vertical section on the line BL -14 of Figure 10, looking in the direction of the arrows.

Referring to the form of the invention illustrated in Figures 1 to 9 inclusive, 10 indicates diagrammatically the side frame of a loom, having the usual upstanding arm 10 supporting, by the straps 11, the heddle frames 12.

The heddle frames, one of which is illustrated in Figure 2, are of usual rectangular formatiomhaving upper cross pieces 13 con-' nected by vertical side pieces 1a. Upper and lower cross bars 15" connect the side pieces and provide a rigid rectangular strum ture. In each heddle frame there is mounted, preferably adjacent the upper cross rod 15, a detector bar 16, which is mounted to have a rocking detector movement. Each detector bar is angular in cross section, as illustrated in Figures 8 and 9, and extends through openings 17 in the heddles. The heddle openings 17 are formed to permit free rocking movement of the bars 16 when the warp threads are unbroken, but are adapted to lock the bar against such movement whenever one of the warp threads breaks. through which the cross rods 15 also extend, preferably below the detector bars, are re duced, as indicated atl7, to receiveva rib 16 upon'the detector bar (Figure 9);- As will be understood, whenever one [of the warp threads breaks, its heddle will drop, causing the rib 16 to fit within the reduced slot 17, whereupon the detector bar will be held against rocking movement, and through" suitable mechanism, when the heddle frame descends, effect stoppage of the loom.

The mechanism thus far described is broadly old, but there are certain details of the related structure which are. novel.

In the first place, it has been found desirable. to limit accurately the rocking movement of the detector bar, preferably ineither direction, and for this purpose,complementary means is provided upon the heddle frame and detector bar, such means taking the form of a collar 18 fixedly and adjustably secured to the detector bar, as by means of a set screw 19, cut away at 20,for aportion of its circumference (Figureo) .to receive a fixed stop 21 upon the heddle frame. The bar is normally maintained in one extreme position by means of a coil spring 22 surrounding its projecting end (Figure 6), one end of the spring bein anchored at 23 to the heddle frame, an

the other end 24 extending through and secured to a sleeve 25 fastened upon the end of the detector bar as by means of a set screw 26. It will be understood that the spring normally tends to rotate the bar to which it is connected, through the collar 25, in a counterclockwise. direction, as viewed in Figure 1, and movement in this direction is limited by the stop 21. The bar is provided upon the sleeve 25 with an eccentric projecting pin 27, which serves to engage suitable means upon the loom as the heddle frame descends, and by such means, the bar has imparted thereto, a detecting movement in a clockwise direction, as viewed Figure 1. Movement in this direction is limited also by the stop 21 engaging the opposite end of the circumferential slot 20 in the stop collar. 2

Another feature of the detector bar mounting and related parts consists in means for maintaining the bar rigid. This means pref- For this purpose, the slots 17,

erably consists, of a bracket 28 secured to p the heddle frame (Figure 2), and having positioned thereon for sliding movement, an angularly formed bracket portion 29, one wall 29 of which extends across the plane of the detector bar and cross rod 15. This wall is provided with slots 30, 31 to receive the detector bar and cross rod, and by vertically adjusting the bracket 29, by means of the screw 32 fitting through a slot in the bracket portion and serving to clamp the same with the remainder of the bracket 28, the detector bar and rod maybe snugly fitted within the slots 30, 31, and reinforced. An important feature of this reinforcing means is the'adjustable bracket 29, which detector bar'may be suitably reinforced'by the bracket 28 and its adjustable portion 29. It will be understood that the portion of the strap mechanism thus far described is broadly old, with the exception of (1) the stop means for limiting rocking movement of the detector bar; (2) the constructionof the spring means for maintaining the bar in a 'noi'm'al position ,a'nd (3) the reinforcing means forthe bar. i i p 2' Referring to the remainder of the structure, it will be understood that there is pro vided means adapted to impart to the detector bar a rocking detector movement, This means preferably takesthe form of a bracket having 'a supporting plate 34 in which i'spositio'ned a bored boss 35, serving to receive a pin or stud 36, secured to the loom frame 10, the bracketplate' being secured to the stud 36 by means ofa set screw 37. A bracket arm 38 extends later ally from theplate 34 and is provided with an elongatedslot 39 through which passes the stud 36 and also a bolt 40 secured to the plate 34 and carrying a clamping nut 41. The bolt and stud maintain the laterally ex- 'ioo tending arm horizontal, due to the fact that they are spaced apart, and'by means of nut 40, the arm may be fixedly heldin any selected position to which itmay be longitudinally moved'for a purpose which will be clear asthe description proceeds. The outer end of the arm 38 has spaced vertical fingers 4 2, 43, forming afork which serves to support a pivot stud 44 for a lever 45. This lever is mounted upon the pivot 44 as a horizontal axis, and extends inwardly from the loom frame to a position beneath the pins 27 upon the detectorbars. It will be observed that the lever has separate portions 46, which, preferably, carry vertically adj ustableT'contact elements, each arranged directly 1n the path of an eccentric pin 27 upon a descending heddle frame. By longitudinal adjustment of the bracket portion 29, which may be effected simply by releasing the clamp nut 41, these contact elements upon the levermay be arranged inproper position, and vertical adjustment ofthe latter will insure engagement with the detector bar projecting pins 27 at the .proper point in the descent of the heddle frame. As will be understood, such contact will effect rocking movement of the detector bar, and to prevent movement of thelever WllGIldllllS engagement occurs, yielding means, such as the spring 48'(Figure 2), may be connected to the lever at the opposite side of its axis from the contacting members. It will be observed that the spring 48 is anchored at 49 to the bracket, and itsopposite end is fastened to a screw 50 extending freely through the lever 45, a stop nut 51 upon the lever serving as means for varying the tension of the spring 48. By adjustment of the nut51, the position of the lever may be changed, and the advantage of this arrangement will be clear from the following description of the connections of the lever with the remainder of the stop mechanism.

It will be understood that when the lever is depressed by a locked detector bar, the

loom will be stopped. The rear end of the lever (Figure 2) receives a link 52, which is fastened to the lever by means of a set screw 53. The link 52 is freely connected to a second link 52, which, in turn, is connected to a member 54 pivotally mounted upon a lug 55 fastened to a reciprocable rod 56, slidable ina bearing bracket 57 on the loomframe. lVhen the lever 45 is in its normal .position illustrated in Figure 2, the member 54 will be positioned as illustrated in Figure 1, in which it is-arranged just out of the path of a continuously moving ele ment 59, preferably arranged'uponthe lay L. VVhenthe lever is depressed by the detector bar, the end of the member 54 to which the link 52 is connected, will be raised, thus depressing the'othe'r end into the path of the dagger 59. Upon the next movement of the lay toward the member 54, the dagger 59 will engage the endof the member 54, and suchengagementwill shift the member 54 longitudinally. This rod is connected to a knock-off member 60, which engages the loom shipper lever S, and, as will be understood, efiect stopping of [the loom. V f

It is thought that the operation ofthe mechanism destribedwillbe entirely clear from the foregoing description. The construction which isone which may be readily applied to any floom, irrespective of the number of heddle frames, it being simply necessary to position in the bracketarm 39,

a lever 45 having a suitable number of contact elements for engagement wlththe eecentric arm upon thedetector bar of each heddle frame. The ready adaptability of the mechanism isfdue also to'the adjustable parts of the supportingbracket, the means for varying the tension of the spring 48, which will alter the position of the lever 45 and of the member 54, which is engageable by the dagger 59. U Furthermore, due to the fact that the contact elements in the lever 45 may be vertically adjusted, it is always possible to obtain engagement of the detector bars with these contact elements at just the proper point inthe travel of the hed'dle frames.

Referring to Figures '10 to 14 inclusive, there is shown a modified construction, in

which 61 indicates a portion of theusual harness frame having cross or guide rods 62 therein, which extend through openings 63 (Figurelil) at the upper and lower ends of theheddles 64. Each heddle also'haspassing therethrough, a detector bar 65, supported in the harness frame. The detector bar is mounted for free movement, preferably a rocking one, about its longitudinal axis, and, as will be noted from Figure 19,, extends freely through the heddles, which, when in having one end anchored in the heddle frame, and the'other end extending into a collar 68 upon the bar, the collar being fixed inposition bymeans of a set screw 69. To limit the movement of'the detector bar under the influence of this spring, the bar has positioned therein, within the-frame, a collar 70, provided with a stop lug 71, which engages a complementary stop lug 72 on a collar 7 3, this collar being arranged adjacent the bar,

preferably on the fixed guide rod 62. As illustrated clearly in Figures 10 and 14,-the twolugsjvill prevent the spring from mov- It. will be understood that as the heddle frame descends, the detector bar'is givena rocking movementin one direction by mechanism which will be'later described, and when the frame is raised, the rod is returned in theopposite direction, by means of the spring, movement under the influence of the spring being limited bymeans of'the stop lu s.

its in the form previously described, so long as thedetector bar is free to rock under the influence of the mechanism to be deing the jbarfrom the normal position illus- I trat'ed in Figures l0'and 12.

ent invention which constitute improvements over the construction disclosed in my patents before mentioned, F (Figure 10) indicates a fixed portionv of the loom, such as the frame, upon which is mounted a bracket consisting of a back strip 7 4 having openings 7 5 vtherein, through which may bepassed means forsecuring the bracket to the loom frame.

The bracket has outstanding side plates 7 6, which serve to support a horizontal pivot. or fulcrum shaft 77, upon which is mounted a series of levers extending horizontally, and

at their ends adjacent the heddle frames provided with means adapted to engage the detector bar and rock the same as the harnesses fall. Thismeans, in the present instance, is

' arm or pin 81, which projects between the fingers of the forked member 78, andas the harness frame is lowered, engages an abutment in the form of a roller 82in the fork, this engagement causing the detector bar to be rocked in a counterclockwise direction,'as viewed in Figure 11. v Each lever 78 has associated therewith, means for yieldingly retaining it against movement, and in a fixed normal position, unless its associated detector bar is locked. This means may be in the form of an outwardly extending spring arm 83. beneath each lever, and engaging it at one side of the axis or fulcrum adjacent the portion which carries the member 78. The upward movement of the lever, under the influence of the spring arm 83 may be limited by means of a. stop 'or detent 84E, pivot-ally mounted upon a shaft ,85 extending betweenthe side plates 76. The lower end of the detent normally engages a shoulder 86, and thus limits upward movement of the lever, The same detent serves also as means forretain ing the lever in depressed position when it is lowered by the engagement therewith of a locked detector bar. It will be noted that each stop has an upwardly projecting portion which afi'ords sufficient weight to cause. the stop to gravitate downwardly in a clockwise .direction when the lever is depressed,

tion of the shipper lever.

and thus engage a second, shoulder 87 (Figure 10,), and inthis position of engagement with the lever, it retains the latterin depressed position. Y

As will be observed, the'bracket, with the series of levers 78 arranged side by side upon the-pivot or fulcrum shaft 77, constitutes a compact mechanism which may be arranged ad acent the harnesses, each lever being provided with upstanding means at 1ts free end .to .receivethe eccentric arm 81 of a detectorbar. Any numberof levers may be arranged. on the shaft 77 correspond- .ing to the number of harnesses, and, mechanism is provided so that when any oneof the levers is depressed by .a' locked bar, the

.loom will bestopped, for instance, by opera- This mechanism, wlichwill now be de scribed, comprises a leveri88 pivoted at one end .89 on the outwardly,projecting, portion of the detent shaft 85, the lever being connectedat its otherend 90 to a pitman or link 91, which extends downwardly, and is pivotallyc onnected to a forkedrod 92 pivoted upona stud 93carried by a fixed bracket 94. The bracket v94 is fixedlysecured to a longitudinally slid'ablebar95 supported by suitable means (not shown) on the 100m frame, and having a hooked end 96 which serves toenga ge theship'per lever S.

Therod 91. is arranged adjacent the path of a -pin or, dagger 97 uponthe lay, a vportion of which isindicated by thereference character L (Figure ll) When the rod 91 isin the. position shown in Figure 11, the operation of the laywill not cause engagement of thetpin 97 with the fork 92; however,as will be understood, it is intended that depression of any one .of the levers 78 by meansof a locked detector :bar,will raise the rod 91 into the path of the dagger 97 on, the'lay,and engagement of the dagger with the fork will shift the, bar ,95 longitudinally and thereby, operate the shipper lever. The

fork 92 may be swung upwardlyby any one of the levers 78, throughthe lever 88 and link 91', and for this purpose, the lever 88 carries a rod 99 which extends over the rear ends of the levers :7 8, and will beengag'ed by any leverwhe'n the same is depressed atits .opposi-teendby a locked detector bar.

Itwill be observed that the mechanism is of very compact character, and may be readily applied to a loom and accommodated to a loom having any number of harnesses, simp'ly by mounting the bracket carrying the .levers 78 upon the loom frameadj acentf the harnesses. v I

' It is thought that the operation, of the me fchanism will be entirely clear from the .foregoing description, itlbeing' understood that the levers 78 are. normally in the position illustrated in Figure 10, and that their ends carryingthe upwardly extending fork members 78. will be depressed by a detector bar only when the same is locked, and in such instance, the depression of the levers will, through the lever 88 and link 91, raise the rod 92 (Figure 11) into the path of the dagger 99, engagement between these two elements causing operation of the shipper lever S.

Obviously, the invention is not limited to the specific embodiments illustraed and described, and such modifications come within its scope as are fairly within the terms of the following claims.

I claim:

LIn a Warp stop motion for looms, the

:tal axis on said bracket but yieldingly held against movement, said member being movable by thetbar when locked. as the heddle frame moves, a continuously moving element on the loom 1ay,'and means having a link connection with said member-and the loom shipper lever and adapted to be moved into the path of said continuously moving ele-' ment only when said bar is locked and moves said member. i a i 2. In a warp stop motion for looms, the combination with a heddle frame having a series of heddles supported by warp thread-s, a rockable barmounted' inrthe heddle frame, the heddles being formed to engage and lock thebar against movement when one of the warp threads breaks, of means on theloom' frame separate fromthe bar adapted to rock the bar as the heddle frame moves, said means comprising a bracket, a me'mberpivot-- ally mounted about a horizontal axis on said bracket but yieldingly held against movement, said memberbeing movable by the bar when locked as the heddle frame moves, a

continuously moving element on the loom lay, and means operatively associated with said member and the loop shipper'lever and adapted to be actuated by said continuously moving element only when said bar is locked and moves said member.

3. In a warp stop motionfor looms the combination witha heddle frame having. a-

series of heddles supported byywarp threads, ofa rockable bar mounted in the heddle frame, the heddles being formed to engage j and lock the bar against movement when one ofthe warp threads breaks, means on the latter islocked, a continuously moving elecombination with a heddle frame having a series of heddles supported by warp threads,

of a rockable bar mounted in the heddle frame, the heddlesbeing formed to engage and lock the bar against movement when one of the Warp threads break-s, means on the loomadapted to rock the bar as the heddle frame moves, said -mea11s comprising a bracket, a horizontally extending lever mounted in said bracket and adapted tobe,

actuated by the bar when the latter is locked,

acontinuously moving element on the loom,

a, member normally positioned out of the path of said element and operatively associated with said lever and the loom shipper lever, and yielding means formaintaining said lever in a normal position but adjustable to vary theposition of the lever and said member, said lever when actuated by? said bar serving tomove said member'into the pathbf said continuously moving ele-, 1 ment.

5; In a warp stop mot-ion for looms, the combination with aheddle frame havinga series of heddles supported by warp threads, of a rockable bar mounted in the heddle frame, the heddles being formed toengage and'lock the bar againstsmovement when one of the warp threads breaks, means on the l00madaptecl to rock the bar as the heddle frame moves,said=-'means comprising a bracket, a horizontally extending lever mounted in said bracket, and adapted to be actuated by the bar when, the latter is looked, a continuously moving elementon the loom lay, a member normally positioned out of the pathpof said elementand operatively associated with said lever and the loom shipper lever, and'yielding means for maintaining said lever in a normal position but adjustableto vary the position ofthe lever and said member, said lever when actuated by said bar serving-to move-said member into the path ofsaid continuously moving ele ment. i I V 1 61111 a warp stop motion for looms, the combination with a plurality of heddle: frames, each having a series of heddlessup ported by warp threads, and a rockable bar mounted in each heddle frame, thelieddles being formed tolockithe'bar against rocking movement when one of the warp threads breaks, of means on the loom frame separate from the bars adapted to rock the bars as" the heddle frames move and to be actuated by a locked bar in any one of the heddle frames to stop the. loom, said means com prismg a'bracket, a lever mounted in said combination with a plurality of heddle frames, each having a series of heddles supported by warp threads, and a rockable bar mounted in each heddle frame, the heddles being formed to lock the bar againstrocking movement when one of the warp threads breaks, of means on the loom frame separate I from the bars adapted to rock the bars ast-he heddle frames move and to be actuated by clocked bar in any one of-the heddle frames to stop the loom, said meanscomprising a bracket, a lever mounted in said bracket and having a plurality of vertically adjust-' able members each operable by a bar in one of saidheddle frames, and means connecting said lever with the loom shipper lever adapted to stop the loom when the'le'ver is'actuated by a locked barin any one of the heddle frames. l

8. In a warp'stop motion for looms, the

combination with a plurality of "heddle frames, each having a series of heddles sup-' ported by warp threads and arockable bar mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement- When one of the warp threads breaks, of means on'the loom frame separatev from the bars adapted to rock the bars'as' the heddle frames move and to beactuated by a locked bar in any on'eof the'heddle frames to stop thezvloom, said meanslcom-' prising a bracket, a lever mounted in said bracket having a plurality of members each engageable by a bar 'in one of said heddle frames, a continuously moving element on the loom, and a member operatively: asso ciated with said lever and the loom shipper lever and-arranged to be engaged by said element only when the lever is actuated by a locked bar. i

9. In awarpistop motion for looms, the combination with a plurality of heddle frames, each having a series of heddles supported by- Warp threads, and a rockable bar mounted in the heddle frame, the heddles be-'.

ing formed to lock the bar against rocking movement when one of the warp threads breaks, ofmeanson the loom frame separate from the 5 bars adapted torock the bars as the heddle frames move and to be actuated by a locked bar in any one of theheddle frames to stop the loom, said meanscompris ing a bracket, a lever mounted in said brack et havinga plurality of vertically adjustable members each engageable by a bar in one; of said heddle frames, a continuously moving element on the loom, and a member operatively associated wlt-h said lever and the loomshipper lever and arranged to be engaged by said element only when the lever is actuated by a locked bar.

10L In-a'w'arp stop motion for looms, the combination with a plurality of heddle frames, each'having a series of 'heddles sup ported'by warpthreads, and a rockablebar mounted in the heddle frame, the heddles being formed to lock the bar againstrocking movement when one of the Warp threads breaks, of means on the loom'frame sepa-" rate frointhe bars adapted to rock the bars as the heddleframes moveand to be actuated bya locked bar in ny one of the heddle frames to' stop the lo0m, said means comprising" a bracket, a lever mounted in said bracket having a plurality ofmembers each engageableby a bar in oneof said heddle frames, a continuously moving element on the loom lay, and a member operatively associated with said lever and the loom shipper lever and arranged to 'be'engaged by said element only when the lever is abtu ated by a locked bar, I

11. Ina warp stop" motion for looms, the

combination 'withafplurality of heddle frames, each-having a series of heddles supported by Warp threads, and a iockablebai mounted in the heddle frame" extending through each heddle, the heddle's being formed to lock the bar against rocking movement-when one of the warp threads breaks, of means on the loom'frame separate from the bars adapted-to rock the bars as theheddleframesmoveand to be actuated by a locked bar in any one of the heddle frames to stop the loom, said means comprising a bracket," a lever mounted" in said bracket having a plurality of members each engageableby a bar in one of said heddle frames, a continuously moving element on the, m, a member operatively associated with said lever and the loomshipper lever andarranged to be engaged by saidelement' only when theflever is ac'tuated by a locked bar,a nd yielding meansconnected Withsaid lever and serving to hold the lever against movement-except when engaged" by a locked bar. r

12. In a warpstop motionxfor' looms, the

combination witha plurality of heddle frames eachhavin'g'a series of heddlessupported bywarp threads, and a rockablebar mounted in "the heddle frame extendingthroughgeach heddle, the, heddles being formed to lock the bar against rocking breaks, of means on the loom frame sep'a rate from the barsadapted to rock thebars as the heddleframes move and tobeactuated by alocked bar in any one of the heddle frames to stop the loom, ,said means comprising a bracket, a lever mounted in said bracket having a plurality of members each engageable by a bar in one of said heddle frames a continuously moving element on the loom, a member operatively associated with said lever and the loom shipper lever and arranged to be engaged by said element 10 only when the lever is actuated by a locked bar, and yielding means connected with said lever and serving to hold the lever against movement except when engaged by a locked bar, said yielding means being adjustable to change the position of said lever and the said member e-ngageable by the continuously moving element.

In testimony whereof I have hereunto set my hand.

HARRY E. KHOURY. 

